Efficient encoding/decoding in the decomposition and recompositi

Details Efficient encoding/decoding in the decomposition and recompositi Efficient encoding/decoding in the decomposition and recompositi

1989-06-01

1991-07-09

Orsino, Joseph A.

Facsimile and static presentation processing

Facsimile

Reduced time or bandwidth for static image communication

358433, 358133, 358447, H04N 1415

Patent

active

050310534

ABSTRACT:
More efficent encoding/decoding in decomposing and recomposing a high resolution image is obtained by employing a unique pixel cluster arrangement. The pixel clusters of an image are classified as one of a plurality of classifications. A unique encoding/decoding technique is assigned to each classification. In one embodiment, a cluster including at least one high resolution pixel to be recomposed from a corresponding low resolution pixel which is a so-called exception to general prediction rules is classified as a first classification. A cluster including no pixels which are exceptions is classified as a second classification. Supplemental information is encoded/decoded for all pixels in a cluster classified as the first classification. Pixels in the cluster classified as the second classification are encoded/decoded according to the general prediction rules.

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R. B. Arps et al., "Progressive Adaptive Bi-Level Image Compression (PBIC) Proposal", ISO/IEC/JTC1/SC2/WG8 JB1G No. 33, Rev. 4, Jan. 25, 1989.
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